Overview
Monopodial epiphytes often forming clumps. Stems short, rooting at the base, Leaves alternate, distichous, strap-shaped. Inflorescences axillary below the lowermost leaf, short, densely-flowered heads, the floral bracts inconspicuous. Flowers white, sometimes marked with green. Sepals and petals free, spreading, subsimilar, subequal. Lip unlobed or obscurely three-lobed, sessile, with a funnel-shaped spur. Column straight, erect, with broad apical wings, the rostellum elongate, folded back on itself; pollinia 2, on separate stipes, the stipes convergent on an elongate common stipe, the stipe folded back on itself in natural position.